<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      class User {
        // 静态属性和方法是在 类的原型上
        static site = '后盾人';
        static host() {
          return 'houdunren.com';
        }
      }
      class Admin extends User {}
      console.dir(Admin);
    </script>
  </body>
</html>
